Bug 360441 - kernel dm: some dm ioctl can fail with 32bit userspace and 64bit kernel
kernel dm: some dm ioctl can fail with 32bit userspace and 64bit kernel
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel (Show other bugs)
x86_64 Linux
low Severity low
: ---
: ---
Assigned To: Milan Broz
Martin Jenner
Depends On:
  Show dependency treegraph
Reported: 2007-10-31 11:29 EDT by Milan Broz
Modified: 2013-02-28 23:05 EST (History)
3 users (show)

See Also:
Fixed In Version: RHBA-2008-0314
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2008-05-21 10:59:58 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

  None (edit)
Description Milan Broz 2007-10-31 11:29:05 EDT
Description of problem:

DM-ioctl structure on 32bit on i386 arch has size 308 bytes,
on x86_64 312 bytes.

Some dm ioctl can then fail because of align check in kernel:

/dmsetup.static.32.rhel -vv message mpath 0 fail_if_no_path
dm version   OF   [16384]
dm message mpath  OF  fail_if_no_path [16384]
device-mapper: message ioctl failed: Invalid argument
Command failed

Because dm processing uses own code to checks validity of ioctl struct,
fix can be backported without changing kABI.
Comment 1 RHEL Product and Program Management 2007-10-31 11:35:31 EDT
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
Comment 4 Don Zickus 2008-01-08 15:46:41 EST
in 2.6.18-64.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5
Comment 7 errata-xmlrpc 2008-05-21 10:59:58 EDT
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


Note You need to log in before you can comment on or make changes to this bug.